#!/bin/sh

# Slackware build script for visualboyadvance-m

# Copyright 2017-2019 orbea
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

PRGNAM=visualboyadvance-m
LIBNAM=vbam_libretro
BRANCH=${BRANCH:-master}
BUILD=${BUILD:-1}
TAG=${TAG:-_git}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

CWD=$(pwd)
TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

set -eu

if wxrc-3.0 --help 2>/dev/null; then
  STANDALONE="${STANDALONE:-yes}"
else
  STANDALONE=no
fi

if [ "${LIBRETRO:=yes}" != yes ] && [ "$STANDALONE" != yes ]; then
  printf %s\\n \
    'ERROR: Both the standalone and Libretro builds are disabled.' >&2
  exit 1
fi

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM
git clone --depth=1 -b $BRANCH https://github.com/$PRGNAM/$PRGNAM
cd $PRGNAM
HEAD="$(git rev-parse --short HEAD)"
DATE="$(git show -s --format=%cd --date=format:%Y.%m.%d)"
VERSION="${DATE}_$HEAD"
chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
  -o -perm 511 \) -exec chmod 755 {} \; -o \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;

if [ "${DEBUG:=0}" != 0 ]; then
  DEBUG=1
  RELEASE=Debug
  SLKCFLAGS="$(printf %s "$SLKCFLAGS" | sed 's/-O2/-O0/')"
else
  RELEASE=Release
fi

if [ "$STANDALONE" = yes ]; then
  WXCONF="/usr/lib$LIBDIRSUFFIX/wx/config/gtk2-unicode-3.0"

  mkdir -p build
  cd build
    cmake -GNinja \
      -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
      -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
      -DCMAKE_INSTALL_PREFIX=/usr \
      -DCMAKE_INSTALL_BINDIR=games \
      -DCMAKE_INSTALL_DATADIR=share/games \
      -DCMAKE_INSTALL_MANDIR=man \
      -DwxWidgets_CONFIG_EXECUTABLE="$WXCONF" \
      -DENABLE_ONLINEUPDATES=OFF \
      -DCMAKE_BUILD_TYPE=$RELEASE ..
    "${NINJA:=ninja}"
    DESTDIR=$PKG "$NINJA" install
  cd ..

  find $PKG/usr/man -type f -exec gzip -9 {} \;
  for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
fi

if [ "$LIBRETRO" = yes ]; then
  (
    cd src/libretro
    make DEBUG=$DEBUG

    install -Dm0644 $LIBNAM.so \
      $PKG/usr/lib${LIBDIRSUFFIX}/libretro/$LIBNAM.so
  )

  curl --create-dirs -o $PKG/usr/lib${LIBDIRSUFFIX}/libretro/info/$LIBNAM.info \
    https://raw.githubusercontent.com/libretro/libretro-super/master/dist/info/$LIBNAM.info
  find $PKG/usr/lib${LIBDIRSUFFIX}/libretro -mindepth 1 -type d -exec chmod 755 {} \;
fi

if [ $DEBUG = 0 ]; then
  find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" |
    grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
fi

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a README.md todo.md doc/* $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
cat $CWD/doinst.sh > $PKG/install/doinst.sh

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-${VERSION}_$BRANCH-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}
